> ## Documentation Index
> Fetch the complete documentation index at: https://hyperframes-fix-nested-composition-media-inpoint.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# US Flow Map

> Animated connection arcs between US cities over a base map — composable origin-destination flow visualization

export const InstallCommand = ({command, item}) => {
  const [copied, setCopied] = React.useState(false);
  const [tuned, setTuned] = React.useState("");
  React.useEffect(() => {
    if (!item) return;
    const read = () => {
      try {
        const raw = new URLSearchParams(window.location.search).get(`vars-${item}`);
        if (!raw) return setTuned("");
        const parsed = JSON.parse(raw);
        if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) return setTuned("");
        if (Object.keys(parsed).length === 0) return setTuned("");
        setTuned(` --vars '${JSON.stringify(parsed)}'`);
      } catch {
        setTuned("");
      }
    };
    read();
    window.addEventListener("hf-vars-changed", read);
    window.addEventListener("popstate", read);
    return () => {
      window.removeEventListener("hf-vars-changed", read);
      window.removeEventListener("popstate", read);
    };
  }, [item]);
  const fullCommand = `${command}${tuned}`;
  const copy = async () => {
    try {
      if (navigator.clipboard && window.isSecureContext) {
        await navigator.clipboard.writeText(fullCommand);
      } else {
        const previous = document.activeElement;
        const scratch = document.createElement("textarea");
        scratch.value = fullCommand;
        scratch.setAttribute("readonly", "");
        scratch.style.position = "fixed";
        scratch.style.opacity = "0";
        document.body.appendChild(scratch);
        scratch.select();
        document.execCommand("copy");
        document.body.removeChild(scratch);
        previous?.focus?.();
      }
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    } catch {}
  };
  return <div className="hf-install-command not-prose my-4 flex items-stretch overflow-hidden rounded-xl border border-zinc-200 bg-zinc-50 dark:border-zinc-800 dark:bg-zinc-900">
      <code className="flex-1 overflow-x-auto whitespace-nowrap border-r border-zinc-200 px-4 py-3 font-mono text-sm text-zinc-800 dark:border-zinc-800 dark:text-zinc-100">
        {fullCommand}
      </code>
      <button type="button" onClick={copy} data-copied={copied ? "true" : "false"} aria-label={`Copy ${command} to the clipboard`} className="hf-install-copy">
        <svg className="hf-install-copy-clipboard" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M14.25 5.25H7.25C6.14543 5.25 5.25 6.14543 5.25 7.25V14.25C5.25 15.3546 6.14543 16.25 7.25 16.25H14.25C15.3546 16.25 16.25 15.3546 16.25 14.25V7.25C16.25 6.14543 15.3546 5.25 14.25 5.25Z" />
          <path d="M2.80103 11.998L1.77203 5.07397C1.61003 3.98097 2.36403 2.96397 3.45603 2.80197L10.38 1.77297C11.313 1.63397 12.19 2.16297 12.528 3.00097" />
        </svg>
        <svg className="hf-install-copy-check" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M2.75 9.5L6.5 13.25L15.25 4.5" />
        </svg>
      </button>
      <span className="hf-install-copy-status" role="status" aria-live="polite">
        {copied ? "Copied" : ""}
      </span>
    </div>;
};

<iframe className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800" title="us-map-flow preview" loading="lazy" srcDoc={`<!doctype html><html><head><meta charset="utf-8"><style>html,body{margin:0;height:100%;overflow:hidden;background:transparent}hyperframes-player{display:block;width:100%;height:100%}</style><script src="https://cdn.jsdelivr.net/npm/@hyperframes/player@0.7/dist/hyperframes-player.global.js"><\/script></head><body><script>fetch("/public/catalog/blocks/us-map-flow.json").then(function(r){return r.json()}).then(function(d){var p=document.createElement("hyperframes-player");p.setAttribute("srcdoc",d.html);p.setAttribute("controls","");p.setAttribute("autoplay","");p.setAttribute("loop","");p.setAttribute("muted","");p.setAttribute("poster","https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/us-map-flow.png");document.body.appendChild(p)});<\/script></body></html>`} />

## Install

<InstallCommand command="npx hyperframes add us-map-flow" item="us-map-flow" />

That writes one file: `compositions/us-map-flow.html`.

## Source

<Accordion title={`us-map-flow.html`}>
  ```html theme={null}
  <!doctype html>
  <html lang="en">
    <head>
      <meta charset="UTF-8" />
      <meta name="viewport" content="width=1920, height=1080" />
      <title>US Flow Map</title>
      <link rel="preconnect" href="https://fonts.googleapis.com" />
      <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
      <link
        href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=block"
        rel="stylesheet"
      />
      <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
      <script src="https://cdn.jsdelivr.net/npm/d3@7/dist/d3.min.js"></script>
      <script src="https://cdn.jsdelivr.net/npm/topojson-client@3.1.0/dist/topojson-client.min.js"></script>
      <style>
        * {
          margin: 0;
          padding: 0;
          box-sizing: border-box;
        }

        html,
        body {
          margin: 0;
          width: 1920px;
          height: 1080px;
          overflow: hidden;
          background: #0f172a;
        }
      </style>
    </head>
    <body>
      <div
        id="us-map-flow"
        data-composition-id="us-map-flow"
        data-width="1920"
        data-height="1080"
        data-start="0"
        data-duration="12"
      >
        <div class="flow-header">
          <h1 class="flow-headline">Interstate Flow Connections</h1>
          <p class="flow-subtitle">Relative volume of major city-to-city corridors</p>
        </div>

        <svg class="flow-svg" viewBox="0 0 1920 1080" preserveAspectRatio="xMidYMid meet">
          <defs>
            <filter id="arc-glow">
              <feGaussianBlur stdDeviation="3" result="blur" />
              <feMerge>
                <feMergeNode in="blur" />
                <feMergeNode in="SourceGraphic" />
              </feMerge>
            </filter>
            <filter id="dot-glow">
              <feGaussianBlur stdDeviation="4" result="blur" />
              <feMerge>
                <feMergeNode in="blur" />
                <feMergeNode in="SourceGraphic" />
              </feMerge>
            </filter>
          </defs>
          <g class="states-group"></g>
          <g class="arcs-group"></g>
          <g class="traveling-dots-group"></g>
          <g class="city-dots-group"></g>
          <g class="city-labels-group"></g>
        </svg>

        <div class="flow-source">Source: Illustrative data</div>

        <style>
          #us-map-flow {
            position: relative;
            width: 1920px;
            height: 1080px;
            background: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
            font-family: "Inter", sans-serif;
            color: #ffffff;
            overflow: hidden;
          }

          #us-map-flow .flow-header {
            position: absolute;
            top: 40px;
            left: 60px;
            z-index: 2;
          }

          #us-map-flow .flow-headline {
            font-size: 48px;
            font-weight: 700;
            color: #f8fafc;
            letter-spacing: -0.02em;
            clip-path: inset(0 100% 0 0);
          }

          #us-map-flow .flow-subtitle {
            font-size: 22px;
            font-weight: 300;
            color: #94a3b8;
            margin-top: 8px;
            opacity: 0;
          }

          #us-map-flow .flow-svg {
            position: absolute;
            top: 0;
            left: 0;
            width: 1920px;
            height: 1080px;
          }

          #us-map-flow .state-path {
            fill: #1e293b;
            stroke: #334155;
            stroke-width: 0.5;
            opacity: 0;
          }

          #us-map-flow .arc-path {
            fill: none;
            stroke: #3b82f6;
            filter: url(#arc-glow);
            stroke-linecap: round;
          }

          #us-map-flow .city-dot {
            fill: #ffffff;
            filter: url(#dot-glow);
            opacity: 0;
          }

          #us-map-flow .city-label {
            fill: #cbd5e1;
            font-family: "Inter", sans-serif;
            font-size: 13px;
            font-weight: 500;
            opacity: 0;
          }

          #us-map-flow .traveling-dot {
            fill: #60a5fa;
            opacity: 0;
          }

          #us-map-flow .flow-source {
            position: absolute;
            bottom: 30px;
            right: 60px;
            font-size: 14px;
            font-weight: 400;
            color: #475569;
            opacity: 0;
          }
        </style>

        <script>
          (function () {
            var NS = "http://www.w3.org/2000/svg";
            var root = document.getElementById("us-map-flow");
            var svg = root.querySelector(".flow-svg");
            var statesGroup = svg.querySelector(".states-group");
            var arcsGroup = svg.querySelector(".arcs-group");
            var travelingDotsGroup = svg.querySelector(".traveling-dots-group");
            var cityDotsGroup = svg.querySelector(".city-dots-group");
            var cityLabelsGroup = svg.querySelector(".city-labels-group");

            var tl = gsap.timeline({ paused: true });

            /* --- City data: name → [longitude, latitude] (D3 uses [lon, lat]) --- */
            var cities = {
              "San Francisco": [-122.4194, 37.7749],
              "New York": [-74.006, 40.7128],
              "Los Angeles": [-118.2437, 34.0522],
              Chicago: [-87.6298, 41.8781],
              Seattle: [-122.3321, 47.6062],
              Austin: [-97.7431, 30.2672],
              Miami: [-80.1918, 25.7617],
              Denver: [-104.9903, 39.7392],
              Houston: [-95.3698, 29.7604],
              Atlanta: [-84.388, 33.749],
              Boston: [-71.0589, 42.3601],
              Dallas: [-96.797, 32.7767],
            };

            /* --- Flow connections --- */
            var flows = [
              { from: "San Francisco", to: "New York", volume: 100 },
              { from: "Los Angeles", to: "Chicago", volume: 85 },
              { from: "Seattle", to: "Austin", volume: 70 },
              { from: "New York", to: "Miami", volume: 90 },
              { from: "Chicago", to: "Denver", volume: 65 },
              { from: "Houston", to: "Atlanta", volume: 75 },
              { from: "Boston", to: "San Francisco", volume: 80 },
              { from: "Denver", to: "Los Angeles", volume: 60 },
              { from: "Atlanta", to: "Dallas", volume: 55 },
              { from: "Miami", to: "New York", volume: 50 },
              { from: "Austin", to: "Seattle", volume: 45 },
              { from: "Dallas", to: "Chicago", volume: 40 },
            ];

            var maxVolume = 100;
            var minWidth = 1.5;
            var maxWidth = 4;

            /* --- Projection centered on continental US --- */
            var projection = d3.geoAlbersUsa().scale(1300).translate([960, 560]);

            var pathGen = d3.geoPath().projection(projection);

            /* --- Project city positions --- */
            var projected = {};
            var cityNames = Object.keys(cities);
            cityNames.forEach(function (name) {
              var p = projection(cities[name]);
              if (p) {
                projected[name] = { x: p[0], y: p[1] };
              }
            });

            /* --- Unique city list for dots/labels (only those that project) --- */
            var visibleCities = Object.keys(projected);

            /* --- Build arc path string (quadratic bezier curving upward) --- */
            function buildArcPath(fromName, toName) {
              var p1 = projected[fromName];
              var p2 = projected[toName];
              if (!p1 || !p2) return null;
              var x1 = p1.x;
              var y1 = p1.y;
              var x2 = p2.x;
              var y2 = p2.y;
              var midX = (x1 + x2) / 2;
              var midY = Math.min(y1, y2) - Math.abs(x2 - x1) * 0.15;
              return "M" + x1 + "," + y1 + " Q" + midX + "," + midY + " " + x2 + "," + y2;
            }

            /* --- Load topology and render states --- */
            d3.json("https://cdn.jsdelivr.net/npm/us-atlas@3/states-10m.json").then(function (us) {
              var states = topojson.feature(us, us.objects.states).features;

              states.forEach(function (feature) {
                var d = pathGen(feature);
                if (!d) return;
                var path = document.createElementNS(NS, "path");
                path.setAttribute("d", d);
                path.setAttribute("class", "state-path");
                statesGroup.appendChild(path);
              });

              /* --- Create arc paths --- */
              var arcPaths = [];
              flows.forEach(function (flow) {
                var d = buildArcPath(flow.from, flow.to);
                if (!d) return;

                var strokeW = minWidth + (flow.volume / maxVolume) * (maxWidth - minWidth);
                var arcOpacity = 0.4 + (flow.volume / maxVolume) * 0.6;

                var path = document.createElementNS(NS, "path");
                path.setAttribute("d", d);
                path.setAttribute("class", "arc-path");
                path.setAttribute("stroke-width", strokeW);
                path.style.opacity = arcOpacity;
                arcsGroup.appendChild(path);

                var len = path.getTotalLength();
                path.style.strokeDasharray = len;
                path.style.strokeDashoffset = len;

                arcPaths.push({ el: path, length: len });
              });

              /* --- Create city dots --- */
              visibleCities.forEach(function (name) {
                var p = projected[name];
                var circle = document.createElementNS(NS, "circle");
                circle.setAttribute("cx", p.x);
                circle.setAttribute("cy", p.y);
                circle.setAttribute("r", 5);
                circle.setAttribute("class", "city-dot");
                cityDotsGroup.appendChild(circle);
              });

              /* --- Create city labels with offset --- */
              visibleCities.forEach(function (name) {
                var p = projected[name];
                var text = document.createElementNS(NS, "text");
                text.setAttribute("x", p.x + 10);
                text.setAttribute("y", p.y - 10);
                text.setAttribute("class", "city-label");
                text.textContent = name;
                cityLabelsGroup.appendChild(text);
              });

              /* --- Create traveling dots (one per arc) --- */
              var travelingDots = [];
              arcPaths.forEach(function () {
                var dot = document.createElementNS(NS, "circle");
                dot.setAttribute("r", 3);
                dot.setAttribute("class", "traveling-dot");
                travelingDotsGroup.appendChild(dot);
                travelingDots.push(dot);
              });

              /* ===== GSAP TIMELINE ===== */

              /* 0s: headline clip-path wipe */
              tl.to(
                "#us-map-flow .flow-headline",
                {
                  clipPath: "inset(0 0% 0 0)",
                  duration: 1,
                  ease: "power2.inOut",
                },
                0,
              );

              /* 0.3s: subtitle fade */
              tl.to(
                "#us-map-flow .flow-subtitle",
                {
                  opacity: 1,
                  duration: 0.5,
                  ease: "power2.out",
                },
                0.3,
              );

              /* 0.6s: states fade in */
              tl.to(
                "#us-map-flow .state-path",
                {
                  opacity: 1,
                  duration: 0.8,
                  ease: "power2.out",
                },
                0.6,
              );

              /* 1.5s: city dots pop in */
              tl.to(
                "#us-map-flow .city-dot",
                {
                  opacity: 1,
                  scale: 1,
                  transformOrigin: "center center",
                  duration: 0.4,
                  stagger: 0.05,
                  ease: "back.out(1.7)",
                },
                1.5,
              );

              /* 2.5s: city labels fade in */
              tl.to(
                "#us-map-flow .city-label",
                {
                  opacity: 1,
                  duration: 0.3,
                  stagger: 0.05,
                  ease: "power2.out",
                },
                2.5,
              );

              /* 3.5s: arcs draw sequentially */
              arcPaths.forEach(function (arc, i) {
                tl.to(
                  arc.el,
                  {
                    strokeDashoffset: 0,
                    duration: 1,
                    ease: "power2.inOut",
                  },
                  3.5 + i * 0.2,
                );
              });

              /* 7.0s: traveling dots animate along paths */
              arcPaths.forEach(function (arc, i) {
                var dot = travelingDots[i];
                var pathEl = arc.el;
                var pathLength = arc.length;

                tl.set(dot, { opacity: 0.9 }, 7.0 + i * 0.1);

                var progress = { value: 0 };
                tl.to(
                  progress,
                  {
                    value: 1,
                    duration: 1.5,
                    ease: "power1.inOut",
                    onUpdate: function () {
                      var pt = pathEl.getPointAtLength(progress.value * pathLength);
                      dot.setAttribute("cx", pt.x);
                      dot.setAttribute("cy", pt.y);
                    },
                    onComplete: function () {
                      gsap.to(dot, { opacity: 0, duration: 0.3 });
                    },
                  },
                  7.0 + i * 0.1,
                );
              });

              /* 9.0s: source fade in */
              tl.to(
                "#us-map-flow .flow-source",
                {
                  opacity: 1,
                  duration: 0.6,
                  ease: "power2.out",
                },
                9.0,
              );

              /* Register timeline */
              window.__timelines = window.__timelines || {};
              window.__timelines["us-map-flow"] = tl;
            });
          })();
        </script>
      </div>
    </body>
  </html>
  ```
</Accordion>

## Usage

After installing, add the block to your host composition:

```html theme={null}
<div data-composition-id="us-map-flow" data-composition-src="compositions/us-map-flow.html" data-start="0" data-duration="12" data-track-index="1" data-width="1920" data-height="1080"></div>
```

Tagged `data` `map` `geography` `usa` `flow` `connections` `arcs`.

## Related topics

* [Browse the complete Catalog](/catalog)
* [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
* [Build a richer composition](/go-further)
